A Service-Differentiated Access Algorithm for Future Cooperative Networks

In this paper, the authors propose a new cooperative random access strategy for future cooperative networks. This scheme considers the different requirements of services, and exploits the cooperative relaying nature for multi-channel environments, e.g. Orthogonal Frequency Division Multiplexing Access (OFDMA). Due to differentiation of services and definition of special channels, those users with Real-Time (RT) request can reserve the access channels in advance, while others with Non-Real-Time (NRT) services can access to the BS or the nearest Distributed Relay Stations (DRSs), which are introduced for cooperative relaying, through sharing those channels remained.